CVE-2025-40272

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-40272", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.183Z", "datePublished": "2025-12-06T21:50:54.629Z", "dateUpdated": "2026-10-15T22:02:42.233Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:09:05.596Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/secretmem: fix use-after-free race in fault handler\n\nWhen a page fault occurs in a secret memory file created with\n`memfd_secret(2)`, the kernel will allocate a new folio for it, mark the\nunderlying page as not-present in the direct map, and add it to the file\nmapping.\n\nIf two tasks cause a fault in the same page concurrently, both could end\nup allocating a folio and removing the page from the direct map, but only\none would succeed in adding the folio to the file mapping. The task that\nfailed undoes the effects of its attempt by (a) freeing the folio again\nand (b) putting the page back into the direct map. However, by doing\nthese two operations in this order, the page becomes available to the\nallocator again before it is placed back in the direct mapping.\n\nIf another task attempts to allocate the page between (a) and (b), and the\nkernel tries to access it via the direct map, it would result in a\nsupervisor not-present page fault.\n\nFix the ordering to restore the direct map before the folio is freed."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerability is reached purely through local syscalls \u2014 `memfd_secret(2)`, `ftruncate(2)`, `mmap(2)` and a page fault on the resulting mapping. There is no network or remote-peer component to secretmem.\nAC:L - The attacker creates both sides of the race: two threads faulting the same file offset under the shared invalidate lock deterministically force the `filemap_add_folio()` `-EEXIST` loser into the buggy path, while additional attacker threads spray page allocations to claim the freed page in the window, and the whole sequence can be retried indefinitely.\nPR:L - `memfd_secret(2)` performs no capability check whatsoever and `CONFIG_SECRETMEM` is `default y` with `secretmem_enable` on by default since v6.10, so any unprivileged local user can reach the fault handler needing only default `RLIMIT_MEMLOCK` headroom for a single page.\nUI:N - The attacker triggers the entire sequence within its own process and threads; no victim action, mount, or file open by another user is required.\nS:U - The corrupted direct-map state and the resulting fault are confined to the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - This is a use-after-free/page-reuse condition, and concretely the post-free `set_direct_map_default_noflush()` can re-insert another task's secretmem page into the kernel direct map, destroying exactly the direct-map-absence guarantee memfd_secret exists to provide and exposing those secrets to kernel-side reads, speculative-execution gadgets, and hibernation images.\nI:H - The stale `set_direct_map_default_noflush()` applies `_PAGE_PRESENT|_PAGE_RW` (x86) / sets `PTE_WRITE` and clears `PTE_RDONLY` (arm64) to a page already reallocated to a different owner, silently downgrading direct-map write protection on foreign memory, and a UAF of an allocator page is a general heap-grooming primitive for control-flow hijack.\nA:H - A kernel access to the recycled page via the still-not-present direct map raises a supervisor not-present page fault, producing an oops/panic \u2014 frequently inside the page allocator while zone/pcp locks are held, hanging the system."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/secretmem.c"], "versions": [{"version": "1507f51255c9ff07d75909a84e7c0d7f3c4b2f49", "lessThan": "bb1c19636aedae39360e6fdbcaef4f2bcff25785", "status": "affected", "versionType": "git"}, {"version": "1507f51255c9ff07d75909a84e7c0d7f3c4b2f49", "lessThan": "1e4643d6628edf9c0047b1f8f5bc574665025acb", "status": "affected", "versionType": "git"}, {"version": "1507f51255c9ff07d75909a84e7c0d7f3c4b2f49", "lessThan": "42d486d35a4143cc37fc72ee66edc99d942dd367", "status": "affected", "versionType": "git"}, {"version": "1507f51255c9ff07d75909a84e7c0d7f3c4b2f49", "lessThan": "52f2d5cf33de9a8f5e72bbb0ed38282ae0bc4649", "status": "affected", "versionType": "git"}, {"version": "1507f51255c9ff07d75909a84e7c0d7f3c4b2f49", "lessThan": "4444767e625da46009fc94a453fd1967b80ba047", "status": "affected", "versionType": "git"}, {"version": "1507f51255c9ff07d75909a84e7c0d7f3c4b2f49", "lessThan": "6f86d0534fddfbd08687fa0f01479d4226bc3c3d", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/secretmem.c"], "versions": [{"version": "5.14", "status": "affected"}, {"version": "0", "lessThan": "5.14", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.197", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.159", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.117", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.59", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.9", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "5.15.197"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.1.159"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.6.117"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.12.59"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.17.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.18"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/bb1c19636aedae39360e6fdbcaef4f2bcff25785"}, {"url": "https://git.kernel.org/stable/c/1e4643d6628edf9c0047b1f8f5bc574665025acb"}, {"url": "https://git.kernel.org/stable/c/42d486d35a4143cc37fc72ee66edc99d942dd367"}, {"url": "https://git.kernel.org/stable/c/52f2d5cf33de9a8f5e72bbb0ed38282ae0bc4649"}, {"url": "https://git.kernel.org/stable/c/4444767e625da46009fc94a453fd1967b80ba047"}, {"url": "https://git.kernel.org/stable/c/6f86d0534fddfbd08687fa0f01479d4226bc3c3d"}], "title": "mm/secretmem: fix use-after-free race in fault handler", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-40272", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:58:37.467202Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T22:02:42.233Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-40272", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:58:37.467202Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T21:58:38.355Z"}}], "cna": {"title": "mm/secretmem: fix use-after-free race in fault handler", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerability is reached purely through local syscalls \u2014 `memfd_secret(2)`, `ftruncate(2)`, `mmap(2)` and a page fault on the resulting mapping. There is no network or remote-peer component to secretmem.\nAC:L - The attacker creates both sides of the race: two threads faulting the same file offset under the shared invalidate lock deterministically force the `filemap_add_folio()` `-EEXIST` loser into the buggy path, while additional attacker threads spray page allocations to claim the freed page in the window, and the whole sequence can be retried indefinitely.\nPR:L - `memfd_secret(2)` performs no capability check whatsoever and `CONFIG_SECRETMEM` is `default y` with `secretmem_enable` on by default since v6.10, so any unprivileged local user can reach the fault handler needing only default `RLIMIT_MEMLOCK` headroom for a single page.\nUI:N - The attacker triggers the entire sequence within its own process and threads; no victim action, mount, or file open by another user is required.\nS:U - The corrupted direct-map state and the resulting fault are confined to the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - This is a use-after-free/page-reuse condition, and concretely the post-free `set_direct_map_default_noflush()` can re-insert another task's secretmem page into the kernel direct map, destroying exactly the direct-map-absence guarantee memfd_secret exists to provide and exposing those secrets to kernel-side reads, speculative-execution gadgets, and hibernation images.\nI:H - The stale `set_direct_map_default_noflush()` applies `_PAGE_PRESENT|_PAGE_RW` (x86) / sets `PTE_WRITE` and clears `PTE_RDONLY` (arm64) to a page already reallocated to a different owner, silently downgrading direct-map write protection on foreign memory, and a UAF of an allocator page is a general heap-grooming primitive for control-flow hijack.\nA:H - A kernel access to the recycled page via the still-not-present direct map raises a supervisor not-present page fault, producing an oops/panic \u2014 frequently inside the page allocator while zone/pcp locks are held, hanging the system."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "1507f51255c9ff07d75909a84e7c0d7f3c4b2f49", "lessThan": "bb1c19636aedae39360e6fdbcaef4f2bcff25785", "versionType": "git"}, {"status": "affected", "version": "1507f51255c9ff07d75909a84e7c0d7f3c4b2f49", "lessThan": "1e4643d6628edf9c0047b1f8f5bc574665025acb", "versionType": "git"}, {"status": "affected", "version": "1507f51255c9ff07d75909a84e7c0d7f3c4b2f49", "lessThan": "42d486d35a4143cc37fc72ee66edc99d942dd367", "versionType": "git"}, {"status": "affected", "version": "1507f51255c9ff07d75909a84e7c0d7f3c4b2f49", "lessThan": "52f2d5cf33de9a8f5e72bbb0ed38282ae0bc4649", "versionType": "git"}, {"status": "affected", "version": "1507f51255c9ff07d75909a84e7c0d7f3c4b2f49", "lessThan": "4444767e625da46009fc94a453fd1967b80ba047", "versionType": "git"}, {"status": "affected", "version": "1507f51255c9ff07d75909a84e7c0d7f3c4b2f49", "lessThan": "6f86d0534fddfbd08687fa0f01479d4226bc3c3d", "versionType": "git"}], "programFiles": ["mm/secretmem.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.14"}, {"status": "unaffected", "version": "0", "lessThan": "5.14", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.197", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.159", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.117", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.59", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.17.9", "versionType": "semver", "lessThanOrEqual": "6.17.*"}, {"status": "unaffected", "version": "6.18", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["mm/secretmem.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/bb1c19636aedae39360e6fdbcaef4f2bcff25785"}, {"url": "https://git.kernel.org/stable/c/1e4643d6628edf9c0047b1f8f5bc574665025acb"}, {"url": "https://git.kernel.org/stable/c/42d486d35a4143cc37fc72ee66edc99d942dd367"}, {"url": "https://git.kernel.org/stable/c/52f2d5cf33de9a8f5e72bbb0ed38282ae0bc4649"}, {"url": "https://git.kernel.org/stable/c/4444767e625da46009fc94a453fd1967b80ba047"}, {"url": "https://git.kernel.org/stable/c/6f86d0534fddfbd08687fa0f01479d4226bc3c3d"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/secretmem: fix use-after-free race in fault handler\n\nWhen a page fault occurs in a secret memory file created with\n`memfd_secret(2)`, the kernel will allocate a new folio for it, mark the\nunderlying page as not-present in the direct map, and add it to the file\nmapping.\n\nIf two tasks cause a fault in the same page concurrently, both could end\nup allocating a folio and removing the page from the direct map, but only\none would succeed in adding the folio to the file mapping. The task that\nfailed undoes the effects of its attempt by (a) freeing the folio again\nand (b) putting the page back into the direct map. However, by doing\nthese two operations in this order, the page becomes available to the\nallocator again before it is placed back in the direct mapping.\n\nIf another task attempts to allocate the page between (a) and (b), and the\nkernel tries to access it via the direct map, it would result in a\nsupervisor not-present page fault.\n\nFix the ordering to restore the direct map before the folio is freed."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.197", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.159", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.117", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.59", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.17.9", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18", "versionStartIncluding": "5.14"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:09:05.596Z"}}}, "cveMetadata": {"cveId": "CVE-2025-40272", "state": "PUBLISHED", "dateUpdated": "2026-10-15T22:02:42.233Z", "dateReserved": "2025-04-16T07:20:57.183Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-12-06T21:50:54.629Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["mm/secretmem.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "bb1c19636aedae39360e6fdbcaef4f2bcff25785", "status": "affected", "version": "1507f51255c9ff07d75909a84e7c0d7f3c4b2f49", "versionType": "git"}, {"lessThan": "1e4643d6628edf9c0047b1f8f5bc574665025acb", "status": "affected", "version": "1507f51255c9ff07d75909a84e7c0d7f3c4b2f49", "versionType": "git"}, {"lessThan": "42d486d35a4143cc37fc72ee66edc99d942dd367", "status": "affected", "version": "1507f51255c9ff07d75909a84e7c0d7f3c4b2f49", "versionType": "git"}, {"lessThan": "52f2d5cf33de9a8f5e72bbb0ed38282ae0bc4649", "status": "affected", "version": "1507f51255c9ff07d75909a84e7c0d7f3c4b2f49", "versionType": "git"}, {"lessThan": "4444767e625da46009fc94a453fd1967b80ba047", "status": "affected", "version": "1507f51255c9ff07d75909a84e7c0d7f3c4b2f49", "versionType": "git"}, {"lessThan": "6f86d0534fddfbd08687fa0f01479d4226bc3c3d", "status": "affected", "version": "1507f51255c9ff07d75909a84e7c0d7f3c4b2f49", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["mm/secretmem.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.14"}, {"lessThan": "5.14", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.197", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.159", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.117", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.59", "versionType": "semver"}, {"lessThanOrEqual": "6.17.*", "status": "unaffected", "version": "6.17.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.18", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/secretmem: fix use-after-free race in fault handler\n\nWhen a page fault occurs in a secret memory file created with\n`memfd_secret(2)`, the kernel will allocate a new folio for it, mark the\nunderlying page as not-present in the direct map, and add it to the file\nmapping.\n\nIf two tasks cause a fault in the same page concurrently, both could end\nup allocating a folio and removing the page from the direct map, but only\none would succeed in adding the folio to the file mapping. The task that\nfailed undoes the effects of its attempt by (a) freeing the folio again\nand (b) putting the page back into the direct map. However, by doing\nthese two operations in this order, the page becomes available to the\nallocator again before it is placed back in the direct mapping.\n\nIf another task attempts to allocate the page between (a) and (b), and the\nkernel tries to access it via the direct map, it would result in a\nsupervisor not-present page fault.\n\nFix the ordering to restore the direct map before the folio is freed."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad:\n\nmm/secretmem: corregir carrera de uso despu\u00e9s de liberaci\u00f3n en el controlador de fallos\n\nCuando ocurre una falla de p\u00e1gina en un archivo de memoria secreta creado con 'memfd_secret(2)', el kernel asignar\u00e1 un nuevo folio para ella, marcar\u00e1 la p\u00e1gina subyacente como no presente en el mapa directo y la a\u00f1adir\u00e1 al mapeo del archivo.\n\nSi dos tareas provocan una falla en la misma p\u00e1gina simult\u00e1neamente, ambas podr\u00edan terminar asignando un folio y retirando la p\u00e1gina del mapa directo, pero solo una lograr\u00e1 a\u00f1adir el folio al mapeo del archivo. La tarea que falla revierte los efectos de su intento (a) liberando el folio nuevamente y (b) devolviendo la p\u00e1gina al mapa directo. Sin embargo, al realizar estas dos operaciones en ese orden, la p\u00e1gina vuelve a estar disponible para el asignador antes de que se vuelva a colocar en el mapa directo.\n\nSi otra tarea intenta asignar la p\u00e1gina entre (a) y (b), y el kernel intenta acceder a ella a trav\u00e9s del mapa directo, se producir\u00eda una falla de p\u00e1gina no presente del supervisor.\n\nCorregir el orden para restaurar el mapa directo antes de liberar el folio."}], "id": "CVE-2025-40272", "lastModified": "2026-10-15T22:19:06.473", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-40272", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-15T21:58:37.467202Z", "version": "2.0.3"}}]}, "published": "2025-12-06T22:15:54.887", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1e4643d6628edf9c0047b1f8f5bc574665025acb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/42d486d35a4143cc37fc72ee66edc99d942dd367"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4444767e625da46009fc94a453fd1967b80ba047"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/52f2d5cf33de9a8f5e72bbb0ed38282ae0bc4649"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6f86d0534fddfbd08687fa0f01479d4226bc3c3d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bb1c19636aedae39360e6fdbcaef4f2bcff25785"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: mm/secretmem: fix use-after-free race in fault handler", "id": "2419905", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2419905"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmm/secretmem: fix use-after-free race in fault handler\nWhen a page fault occurs in a secret memory file created with\n`memfd_secret(2)`, the kernel will allocate a new folio for it, mark the\nunderlying page as not-present in the direct map, and add it to the file\nmapping.\nIf two tasks cause a fault in the same page concurrently, both could end\nup allocating a folio and removing the page from the direct map, but only\none would succeed in adding the folio to the file mapping. The task that\nfailed undoes the effects of its attempt by (a) freeing the folio again\nand (b) putting the page back into the direct map. However, by doing\nthese two operations in this order, the page becomes available to the\nallocator again before it is placed back in the direct mapping.\nIf another task attempts to allocate the page between (a) and (b), and the\nkernel tries to access it via the direct map, it would result in a\nsupervisor not-present page fault.\nFix the ordering to restore the direct map before the folio is freed."], "name": "CVE-2025-40272", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-12-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40272\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40272\nhttps://lore.kernel.org/linux-cve-announce/2025120716-CVE-2025-40272-507b@gregkh/T"], "threat_severity": "Moderate"}

{}